410 



where ? If so, are there like quantities found at the 

 mouths of auxiliary branches, running through similar 

 districts, and discharging themselves on the west, or 

 north west side of a river ? 



36th. If a river has a southerly course, and an aux- 

 iliary branch falls into it on the west side, on which 

 side of the branch are the alluvial banks the highest ? 

 and in particular, where there are two alluvial banks. 



37th. If a river discharges itself into the sea, how 

 high does the tide of the latter rise at that place ? 



38th. At what rate does the tide, at half flood, flow 

 up the river, and to what extent does it check the cur- 

 rent of the river ? 



39th. If there are deltas at the mouths of rivers, 

 what are their lengths, breadths, and heights, above 

 the level of the sea ? 



40th. Are they ever generally or partially overflown 

 by the tides of the sea, or freshes of the rivers ? 



41st. What are the appearances of their banks ? 



43d. To what extent have they been known to in- 

 crease, within the longest known period? 



43d. Are they covered with forest trees ? If so, of 

 w r hat kind and size are they, and how near do they 

 approach the sea? 



44th. Are there any sandy districts or deserts in the 

 vicinity of such deltas ? If, so, how are they situated; 

 and what are their lengths, breadths, &c. ? 



